CN103586186A - Vehicle coating process - Google Patents

Abstract

The invention discloses a vehicle coating process. The vehicle coating process comprises the following operation steps of (a), pretreatment of steel and sectional materials: cleaning oil contamination and dust on surfaces of the used steel and the used sectional materials, keeping the steel and the sectional materials dry, enabling the material pretreatment level to reach Sa 2.5 level by sanding and polishing, and performing per-coating on a layer of antirust paint with the thickness of 15-20 micrometers; and (b), treatment before coating: removing oil, examining surfaces of workpieces before the workpieces enter a shot-blast room, performing ungreased treatment on local oil contamination, coating diluent on the surface of the oil contamination to clean the oil contamination, examining cleaned portions after surfaces of the diluent are dry, and cleaning the workpieces again if the surfaces of the workpieces still have the oil contamination. The coating thickness is uniform, the coating process is simple and has a high effect, the cost is reduced, and the quality is guaranteed.

Description

A kind of vehicle paintwork technique

Technical field

The present invention relates to vehicular technology, specifically belong to a kind of vehicle paintwork technique.

Background technology

Vehicle coating process generally can be divided into two large divisions: the one, and before application, metallic surface is processed, and is also pretreatment technology; The 2nd, the construction technology of application.Surface treatment mainly comprises the removing of old dope layer when removing greasy dirt, dust, the corrosion of surface of the work and carrying out repairing work etc., to improve the surface state of workpiece.Comprise according to various concrete conditions surface of the work is carried out to machining and chemical treatment, as phosphatization, oxidation and Passivation Treatment.

Existing vehicle coating process, for modern car body instructions for use, can not meet real requirement, requires further improvement.

Summary of the invention

The object of this invention is to provide a kind of vehicle paintwork technique, coating layer thickness is even, and coating process simple effects is good, reduces costs, and ensures the quality of products.

Technical scheme of the present invention is as follows:

A technique, includes following operating procedure:

1, Coating Pretreatment

1), pre-treatment of substrate

While taking for steel ground, if corrosion is serious, needs polishing, and brush 10-20 μ m antirust paint;

2), blasting treatment

Enter before car load sandblast operation, should first remove weld seam remaining welding slag and splash around, after sand blasted surface is processed, the position that is unfavorable for operation for bent angle, dead angle etc., emphasis is processed, weld metal zone, welding heat affected zone and other need the surface of sandblast, and in the model that roughness requires to reach coarse, 2 grade standards, derusting grade reach Sa2.5 level;

2, spray paint and paint film is dried

1), painting operation environmental requirement

On moist surface, do not allow to carry out application, require surface of steel plate temperature should be less than 85% higher than 3 ℃ of dew points or relative humidity;

2), spraying operation

For concealment part or difficult spray position, must carry out precoating work, while spraying paint, spray gun keeps vertical with quilt spray surface, apart from 200-300mm, the speed that spray gun moves is wanted evenly, and the translational speed of operation surface be take 1m/s as good relatively, priming paint thickness 25 ± 5 μ m, finish paint thickness 45 ± 5 μ m.

Coating process simple effects of the present invention is good, reduces costs, and ensures the quality of products, and guarantees coating performance experiment test percent of pass, can effectively improve the anticorrosion quality of this series products, the test of especially severe etching condition.

The specific embodiment

A technique, includes following operating procedure:

1, Coating Pretreatment

1), pre-treatment of substrate

While taking for steel ground, if corrosion is serious, needs polishing, and brush 10-20 μ m antirust paint;

2), blasting treatment

Enter before car load sandblast operation, should first remove weld seam remaining welding slag and splash around, after sand blasted surface is processed, the position that is unfavorable for operation for bent angle, dead angle etc., emphasis is processed, weld metal zone, welding heat affected zone and other need the surface of sandblast, and in the model that roughness requires to reach coarse, 2 grade standards, derusting grade reach Sa2.5 level;

2, spray paint and paint film is dried

1), painting operation environmental requirement

On moist surface, do not allow to carry out application, require surface of steel plate temperature should be less than 85% higher than 3 ℃ of dew points or relative humidity;

2), spraying operation

For concealment part or difficult spray position, must carry out precoating work, while spraying paint, spray gun keeps vertical with quilt spray surface, apart from 200-300mm, the speed that spray gun moves is wanted evenly, and the translational speed of operation surface be take 1m/s as good relatively, priming paint thickness 25 ± 5 μ m, finish paint thickness 45 ± 5 μ m.

Claims (1)

1. a vehicle paintwork technique, is characterized in that, includes following operating procedure:

1, Coating Pretreatment

1), pre-treatment of substrate

While taking for steel ground, if corrosion is serious, needs polishing, and brush 10-20 μ m antirust paint;

2), blasting treatment

Enter before car load sandblast operation, should first remove weld seam remaining welding slag and splash around, after sand blasted surface is processed, the position that is unfavorable for operation for bent angle, dead angle etc., emphasis is processed, weld metal zone, welding heat affected zone and other need the surface of sandblast, and in the model that roughness requires to reach coarse, 2 grade standards, derusting grade reach Sa2.5 level;

2, spray paint and paint film is dried

1), painting operation environmental requirement

On moist surface, do not allow to carry out application, require surface of steel plate temperature should be less than 85% higher than 3 ℃ of dew points or relative humidity;

2), spraying operation

For concealment part or difficult spray position, must carry out precoating work, while spraying paint, spray gun keeps vertical with quilt spray surface, apart from 200-300mm, the speed that spray gun moves is wanted evenly, and the translational speed of operation surface be take 1m/s as good relatively, priming paint thickness 25 ± 5 μ m, finish paint thickness 45 ± 5 μ m.